slideshow/source/engine/transitions/pinwheelwipe.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
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   9  * This file incorporates work covered by the following license notice:
  10  *
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  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20
  21 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  22 #include "clockwipe.hxx"
  23 #include "pinwheelwipe.hxx"
  24
  25
  26 namespace slideshow::internal {
  27
  28 ::basegfx::B2DPolyPolygon PinWheelWipe::operator () ( double t )
  29 {
  30     ::basegfx::B2DPolygon poly( ClockWipe::calcCenteredClock(
  31                                     t / m_blades,
  32                                     2.0 /* max edge when rotating */ ) );
  33     ::basegfx::B2DPolyPolygon res;
  34     for ( sal_Int32 i = m_blades; i--; )
  35     {
  36         ::basegfx::B2DPolygon p(poly);
  37         p.transform(basegfx::utils::createRotateB2DHomMatrix((i * 2.0 * M_PI) / m_blades));
  38         res.append( p );
  39     }
  40     res.transform(basegfx::utils::createScaleTranslateB2DHomMatrix(0.5, 0.5, 0.5, 0.5));
  41     return res;
  42 }
  43
  44 }
  45
  46 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */